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Your best bud that willingly to hide your boner in front of the girl/boy you attracted to. Usually using a book or standing in front of you making small talk to the said girl/boy, while you busy rearranging the boner. A True Best Friend.
A: Here comes Abby.
B: Oh crap! I got a boner, down boy down I say!
A: Don't worry *covers your junk with his school bag*
C: Hey guys!
A and B: Hey there Abby!
B: That was close, thanks bro
A: Don't worry, we are shield-broner.
B: You over mine, I cover yours, Shield-Broners for life!
by UrbanHunk July 04, 2017
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